Quick connect and disconnect hammer tool

Patent metadata

Field	Value
Publication number	US-10883249-B2
Application number	US-201815947189-A
Country	US
Kind code	B2
Filing date	Apr 6, 2018
Priority date	Apr 6, 2018
Publication date	Jan 5, 2021
Grant date	Jan 5, 2021

Abstract

A method of retaining a hammer tool in the front head of a powercell assembly of a hammer assembly includes biasing a hammer tool retaining pin such that a portion of the tool retaining pin extends into a tool receiving bore of the front head of the powercell assembly, holding a hammer tool in the tool receiving bore of the front head of the powercell assembly via the tool retaining pin, and releasing the hammer tool remotely from the hammer assembly.

First claim

What is claimed is:

1. A powercell assembly for use with a hammer assembly, the power cell assembly comprising:
a front head defining
an exterior;
a first bore defining a hammer tool movement axis and a first bore maximum dimension measured along a direction perpendicular to the hammer tool movement axis,
a second bore defining a second bore maximum dimension measured along a direction parallel to the hammer tool movement axis, the second bore extending from the first bore along a second bore longitudinal axis that forms a first oblique angle with the hammer tool movement axis;
a third bore defining a third bore maximum dimension measured along a direction parallel to the hammer tool movement axis, the third bore extending from the second bore along a third bore longitudinal axis that forms a second oblique angle with the hammer tool movement axis;

wherein the third bore maximum dimension is greater than the second bore maximum dimension, and the front head further defines a fourth bore extending from the third bore to the exterior at atmospheric pressure.

2. The powercell assembly of claim 1 , further comprising a tool retaining pin extension mechanism operatively associated with the third bore and a tool retaining pin retraction mechanism operatively associated with the third bore.

3. The powercell assembly of claim 2 , wherein the tool retaining pin extension mechanism includes a spring.

4. The powercell assembly of claim 3 , wherein the spring is a compression coil spring.

5. The powercell assembly of claim 3 , wherein the tool retaining pin retraction mechanism includes a fluid conveying bore that is in communication with the third bore.

6. The powercell assembly of claim 5 , further comprising a tool retaining pin including a shaft portion and a head portion, the shaft portion being disposed in the second bore and the head portion being disposed in the third bore.

7. The powercell assembly of claim 6 , wherein the fluid conveying bore is in communication with the third bore adjacent the second bore and the spring is disposed in the third bore behind the head portion of the tool retaining pin.

8. The powercell assembly of claim 1 , further comprising a breather plug disposed in the fourth bore.

Assignees

• Caterpillar Inc

Inventors

• Grzybowski Joshua
• Tang Dennis Wai Man
• Fortner Francis Eric
• Henning Curtis A

Classifications

• B25D2217/0038

  Locking members of special shape · CPC title

• B25D2250/125

  Hydraulic tool components · CPC title

• B25D17/08 Primary

  Means for retaining and guiding the tool bit, e.g. chucks {allowing axial oscillation of the tool bit (B25D17/005 takes precedence)} · CPC title

• B25D2217/0053

  Devices for securing the tool retainer to the machine part · CPC title

• B25D2250/371

  Use of springs · CPC title